KR101644281B1 - Method and apparatus for finding small cells - Google Patents

Method and apparatus for finding small cells Download PDF

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Publication number
KR101644281B1
KR101644281B1 KR1020157005457A KR20157005457A KR101644281B1 KR 101644281 B1 KR101644281 B1 KR 101644281B1 KR 1020157005457 A KR1020157005457 A KR 1020157005457A KR 20157005457 A KR20157005457 A KR 20157005457A KR 101644281 B1 KR101644281 B1 KR 101644281B1
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South Korea
Prior art keywords
small cell
ue
specific signal
base station
signal
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KR1020157005457A
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Korean (ko)
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KR20150038548A (en
Inventor
웨이 고우
슈퀴앙 시아
보 다이
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지티이 코포레이션
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Priority to CN201210353418.1A priority Critical patent/CN102883408B/en
Priority to CN201210353418.1 priority
Application filed by 지티이 코포레이션 filed Critical 지티이 코포레이션
Priority to PCT/CN2013/083243 priority patent/WO2014044132A1/en
Publication of KR20150038548A publication Critical patent/KR20150038548A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0203Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0225Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices
    • Y02B60/50
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/10Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT]
    • Y02D70/12Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks
    • Y02D70/126Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 4th generation [4G] networks
    • Y02D70/1262Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 4th generation [4G] networks in Long-Term Evolution [LTE] networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/10Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT]
    • Y02D70/12Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks
    • Y02D70/126Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 4th generation [4G] networks
    • Y02D70/1264Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 4th generation [4G] networks in Long-Term Evolution Advanced [LTE-A] networks

Abstract

The present invention discloses a method and apparatus for finding a small cell, the method comprising activating a small cell of a macrocell and triggering transmission of a specific signal and triggering a user terminal (UE) to receive the specific signal The method comprising the steps of: receiving, by the base station, information of a small cell determined to be found and reported according to a specific signal received by the UE; and selecting a small or all small cell in the small cell determined by the UE As a preliminary service small cell of the UE. The present invention realizes that a UE under a macrocell in a wireless communication system heterogeneous network can find a small cell under the macrocell and a network can select a small cell suitable for the UE to provide a service, Has ensured that both the network side and the UE effectively save energy.

Description

[0001] METHOD AND APPARATUS FOR FINDING SMALL CELLS [0002]

Field of the Invention [0002] The present invention relates to a mobile communication field, and more particularly, to a method and apparatus for finding a small cell.

With the development of the mobile communication industry and the steady increase in demand for mobile data services, users are increasingly demanding the speed and quality of service (Qos) of mobile communication, and therefore, before 3G mobile communication (3G) Research and development work has already begun on the next generation mobile communication system, and a relatively typical example is the LTE (Long Term Evolution) project developed by the 3rd Generation Partnership Project (3GPP). The LTE system has a frequency of up to 20 MHz (megahertz) Spectrum bandwidth can be provided. As networks evolve and evolve, evolved LTE (LTE-A) is an evolutionary system for LTE that can provide a high frequency spectrum bandwidth of 100 MHz and can support more lively and high quality communications, while the LTE-A system It has excellent backward compatibility. The LTE-A system has multiple component carriers (CCs). One LTE terminal operates only on CCs with some backward compatibility. However, the LTE-A terminals with relatively high capability perform transmission on multiple CCs at the same time And the terminal of the LTE-A simultaneously implement data transmission / reception in a plurality of component carriers, thereby improving the bandwidth. This technique is referred to as a multi-carrier aggregation technique.

At the current level of LTE, the frequency spectrum efficiency is improved and a small cell is introduced in order to solve the user terminal (UE) communication in the local hotspot area. The feature of the small cell is that the coverage range is small The transmission power is low but the deployment density is high. A small cell is said to correspond to a macro cell, and a macro cell generally has a relatively large coverage range (a radius of 500 m or more) and a high transmission power, a macro cell can use the same frequency as a small cell, Frequency can also be used. In the case of using different frequencies, macrocells generally use relatively low frequency bands and provide a relatively large coverage range better, while small cells generally use a relatively high frequency band and provide high data rate . 1 shows the coverage of a typical macro cell and a small cell, where there are very many small cells under macrocell coverage, each small cell uses a different frequency band and the macrocell has a frequency point f1 And the small cell uses frequency point f2. Of course, in the scenario of a carrier set, it is possible to use a plurality of frequency points of a macro cell, and a plurality of small frequency cells can use frequency points, and the frequency points of the macro cell and the small cell do not overlap, , Macrocells generally use frequency points below 2 GHz and small cells generally use frequency points above 3 GHz.

In a system in which a small cell is configured, the UE must perform another frequency test frequently, which affects the UE as follows.

1. Power consumption of the UE increases.

2. It affects the transmission of data of the macro cell to the terminal. This is because, in other frequency tests, most UEs must stop transmitting data at the original frequency.

Therefore, in a system in which a large number of small cells exist, optimization of small cell measurement should be considered to help save terminal energy.

Also, in the current study, on the basis of multi-carrier aggregation techniques, the LTE R11 step has introduced new requirements for frequency spectrum resource utilization, network energy savings and inter-cell interference suppression. In order to realize this purpose, a new carrier type is proposed and a carrier aggregation technique is applied. The main feature of the new carrier is that it does not need to consider the backward compatibility in the design and it can apply more new technology among them. For example, the definition of a new carrier in the current LTE R11 should be applied in pairs with at least one compatible carrier and does not constitute a cell-specific reference signal (CRS) of the LTE R8 in the new carrier, Avoiding severe CRS interference at this cell edge, and in particular avoiding CRS interference between macrocells and small cells in heterogeneous network (HetNet) scenarios.

The fact that all of the carriers in a small cell are configured as a new carrier type can effectively help a small cell save power such as a small cell can be turned off when there is no service UE to help the network side save power. However, as to how a small cell after the off-time is discovered by a UE that should constitute a small cell, how it is configured in the UE, and the number of small cells is very large, We have not been able to provide a solution to the above problem.

In view of this, the embodiment according to the present invention provides a method and an apparatus for finding a small cell in which a UE under at least a macro cell solves a discovery problem for a small cell under the macro cell and realizes energy saving on the network side and the UE .

In order to achieve the above-mentioned object, the technical solution of the embodiment according to the present invention is implemented as described above.

In a method for finding a small cell, the method includes the step of triggering a base station of a macrocell to receive a specific signal from a user terminal (UE), the specific signal for identifying a small cell.

Preferably, the base station notifies the base station of the small cell through the signaling to transmit the specific signal.

Preferably, after the base station triggers the UE to receive a specific signal, the method further comprises the steps of: discovering and establishing information of the small cell received by the base station and reported by the UE according to the received specific signal; Selecting a small or all small cell in the small cell determined by the UE and configuring it as a spare service small cell of the UE.

Preferably, after the base station selects some or all of the small cells in the small cell determined by the UE and configures them into spare service small cells of the UE, the method further comprises the step of the base station transmitting a measurement signal of the spare service small cell to the UE And the base station receives a measurement result for the spare service small cell reported by the UE and selects a small cell serving for the UE in the spare service small cell according to the measurement result, To the small cell serving for the service.

Preferably, the base station selects a small cell serving for the UE in the spare service small cell, according to the load situation of the small cell, the channel quality, and the UE carrier aggregation capability.

Preferably, the specific signal is

Discovery signaling;

A channel state information reference signal (CSI-RS);

A main synchronization signal PSS and / or a sub synchronization signal SSS;

A synchronous tracking reference signal; And

Cell reference signal (CRS).

Preferably, the specific signal is notified to the UE via the macrocell by the base station, or the base station notifies the UE of the value range or the detection range of the specific signal via the macro cell.

Preferably, in the carriers in the small cell, some carriers or all carriers are new carrier types.

Preferably, the small cell does not support camping of the UE in an idle state.

Preferably, when not transmitting data for the UE in the small cell, the small cell is deactivated and the specific signal is not transmitted; When transmitting data for the UE in the small cell, the small cell is in an active state, and the specific signal is transmitted.

Preferably, the base station only activates a small cell and triggers transmission of a specific signal when it is determined that at least one UE should configure a small cell, and the specific signal of the small cell in the inactive state is not transmitted.

Preferably, the base station triggers the UE to receive a specific signal by transmitting a dedicated radio resource control RRC signaling or broadcast message.

Preferably, the UE does not receive the specific signal before it is triggered by the base station.

Preferably, the small cell determined by the UE to report to the base station is a small cell whose channel quality meets the needs.

Preferably, the base station selects a small or all small cell in the small cell determined by the UE according to the load condition of the small cell, the channel quality, and the capability of the UE carrier aggregation to constitute the spare service small cell of the UE.

Preferably, the measurement signal is a CSI-RS or a cell reference signal (CRS).

Preferably, when no data is transmitted for a UE in a small cell or when a small cell is not configured as a spare service small cell, the measurement signal of the spare service small cell is not transmitted, and when data is transmitted for the UE in a small cell Or when the small cell is configured as a spare service small cell, the measurement signal of the spare service small cell is transmitted.

Preferably, the method further comprises not transmitting a particular signal of the small cell when it is determined that the small cell is not configured as a spare service small cell of the UE.

In a small cell discovery apparatus, in a base station applied to a macro cell,

A trigger module for triggering the user terminal (UE) to receive a specific signal, the specific signal being configured to identify a small cell.

Preferably, the trigger module notifies the base station of the small cell through the signaling to transmit the specific signal.

Advantageously, the apparatus comprises an information receiving module configured to receive information of a small cell which the UE has determined to discover and report according to the particular signal received,

And a configuration module configured by selecting a small or all of the small cells in the small cell determined by the UE and configuring the spare service small cells of the UE.

Advantageously, the apparatus triggers to transmit a measurement signal of the spare service small cell to the UE, receives a measurement result for the spare service small cell reported by the UE, and, in accordance with the measurement result, Further comprising an activation module configured to select a small cell serving for the UE and activate it into a small cell serving for the UE.

Advantageously, the activation module is also configured to select a small cell serving for the UE in the spare service small cell, according to the load situation of the small cell, the channel quality, and the UE carrier aggregation capability.

Preferably, the trigger module is further configured to trigger the UE to receive a specific signal by transmitting a dedicated radio resource control RRC signaling or broadcast message.

Preferably, the configuration module is also configured to select some or all of the small cells in the small cell determined by the UE according to the load condition of the small cell, the channel quality, and the UE carrier aggregation capability to configure the spare service small cell of the UE .

In a small cell net element,

A trigger reception module configured to receive a notification that a base station of a macro cell transmits a specific signal and the specific signal to identify a small cell in an inactive state;

And a specific signal transmission module configured to receive the notification of the base station of the macro cell and then transmit the specific signal to the UE in the macro cell.

Advantageously, said small cell network element is configured to transmit a measurement signal of a spare service small cell to said UE under the trigger of said base station when said small cell is selected by said base station as a spare service small cell of user terminal Module.

Advantageously, the small cell network element further comprises a UE service module configured to provide services for the UE after being activated by the base station when selected as a small cell serving by the base station for the UE.

Preferably, the small cell does not support camping of the UE in an idle state.

Advantageously, said small cell network element is inactive when it is not transmitting data for the UE and does not transmit said specific signal; When there is a UE transmitting data to the small cell, the small cell network element is active and transmits the specific signal.

Preferably, if the small cell network element does not transmit data for the UE or if the small cell is not configured as a spare service small cell, the small cell network element does not transmit the measurement signal of the spare service small cell, When the element transmits data for the UE or when the small cell is configured as a spare service small cell, the small cell network element transmits the measurement signal of the spare service small cell.

In the user terminal UE,

A specific signal receiving module configured to receive a specific signal by a trigger of a base station of a macro cell and to identify a small cell subordinate to the macro cell,

And a small cell reporting module configured to discover and confirm information of the small cell according to the received specific signal and report to the base station.

Advantageously, the UE further comprises a measurement module configured to receive a measurement signal of the spare service small cell selected by the base station and to report measurement results for the spare service small cell to the base station.

Preferably, the specific signal receiving module does not receive the specific signal before being triggered by the base station.

Preferably, the small cell reporting module is a small cell that establishes a small cell for reporting to the base station, wherein the channel quality meets the needs.

The method and apparatus for finding a small cell provided by an embodiment according to the present invention is characterized in that in a wireless communication system heterogeneous network, a UE under a macro cell can find a small cell under the macro cell and a network side selects a small cell And the present invention mechanism has ensured that both the network side and the UE effectively save energy.

1 is a view showing the coverage of a macro cell and a small cell in the prior art,
2 is a flow chart of a method of finding a small cell in an embodiment according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

The method of finding a small cell provided by the embodiment according to the present invention mainly includes the following steps as shown in Fig.

Steps 201 to 202: The base station of the macro cell activates a small cell, triggers transmission of a specific signal, and triggers the UE to receive a specific signal, which is intended to identify a small cell in an inactive state. Here, the trigger includes transmitting a signaling notification or notifying via a special signal, for example, the base station transmits a pulse signal. The base station of a macro cell and the base station of a small cell are substantially one base station, and a heterogeneous network is introduced here. A small cell in an inactive state refers to a small cell that provides services for the UE.

The step may also be collectively referred to as triggering the base station to transmit a particular signal and trigger the base station to receive the specific signal from the UE. The base station can manage the small cell, for example, the small cell is dependent on the macro cell. It may also be two macro base stations or two small cells. The base station triggers the transmission of a specific signal by notifying the base station of the small cell through a signaling to transmit a specific signal.

The base station of the macro cell (i.e., the eNB shown in FIG. 2) triggers transmission of a specific signal to identify a small cell that is dependent on demand and triggers the UE to receive a specific signal.

The specific signal is notified to the UE via the macro cell by the base station or the base station notifies the UE of the value range or the detection range of the specific signal through the macro cell.

The base station only activates the small cell and triggers the transmission of a specific signal when it is determined that at least one UE should configure a small cell, and the specific signal of the small cell in the inactive state is not transmitted.

The base station triggers the UE to receive a specific signal by transmitting a dedicated radio resource control (RRC) signaling or broadcast message.

The UE does not receive the specific signal before it is triggered by the base station.

Step 203: The base station receives the information of the small cell which the UE has decided to find and report by the specific signal received.

The step may describe the base station as receiving the reporting information determined by the specific signal received by the UE. The step may be an optional step. For example, after steps 201 to 202, the base station uses the information in step 203 as a reference signal for establishing a small cell.

The UE identifies and confirms the corresponding small cell by the received specific signal, and reports the determined small cell information to the base station. A small cell that the UE has determined to report to the base station is a small cell whose channel quality meets the needs. For example, the UE may report the ID of the M cells having the best measurement result, or may report the index and the measurement strength of the M cells having the best measurement result. If measurements are made on carriers of different frequencies, the corresponding frequency point information should be added and reported.

Step 204: The BS selects a small or all small cell in the small cell determined by the UE, and configures the small cell as a spare service small cell of the UE. Here, the spare service small cell indicates that the small cell is configured in the UE but that the small cell should finally determine whether to provide data transmission, service for the UE.

The above step may describe that the base station configures the service cell of the UE according to the information reported by the UE. The step may be an optional step. For example, the base station constructs a service small cell for the UE referring only to the small cell information reported by the UE, and in an extreme case (for example, when all of the small cells reported by the UE are under load The relatively small cell that the base station has configured for the UE will not be selected in the small cell reported by the UE.

The base station selects some or all of the small cells from the small cells reported by the UE and configures them as spare service small cells of the UE to complete the process of configuring the small cells for the UEs.

The base station selects a small or all small cell in the small cell determined by the UE according to the load condition of the small cell, the channel quality, and the UE carrier aggregation capability, and configures it as a spare service small cell of the UE.

When it is determined that the small cell is not configured as a spare service small cell of the UE, it no longer transmits a specific signal for identifying the small cell. Preferably, after step 203, step 203a may be further performed, and the base station informs the mobile station to stop transmission of a specific signal for identifying a small cell not configured as a spare service small cell of the UE.

Preferably, the method further includes steps 205 through 207 after step 204, wherein the base station triggers the measurement signal of the spare service small cell to be transmitted to the UE, and the base station measures the measurement result for the spare service small cell And selects a small cell serving for the UE in the spare service small cell according to the measurement result to activate the small cell serving for the UE.

The base station selects a small cell serving for the UE in the spare service small cell according to the load condition of the small cell, the channel quality, and the UE carrier aggregation capability.

Before the small cell is configured as a spare service small cell, the measurement signal for the small cell is not transmitted.

In the case where data is not transmitted for a UE in a small cell or when a small cell is not configured as a spare service small cell, when a measurement signal of a spare service small cell is not transmitted, when data is transmitted for a UE in a small cell, If the spare cell is configured as a small cell, the measurement signal of the spare cell is transmitted.

To explain, the step corresponding to the dashed arrow in the flow shown in Fig. 2 is an optional step.

In the above-described flow, some processing is performed on the base station and the UE so that the base station and the UE can save energy. According to an embodiment of the present invention, if some of the carriers of the small cell are new carrier types or all of them are new carrier types, preferably small cells are not configured in any one UE or data is transmitted The small cell is in a deactivated state (indicating that the small cell is off and maintaining energy saving) without transmitting any information about the small cell (including the specific signal and the measurement signal) Before triggering the transmission of a particular signal, the small cell is in a deactivated state. (E.g., a specific signal) related to the small cell only when the base station is in demand, thereby ensuring energy saving on the network side. The small cell does not provide a non-idle UE camping, at which time the non-idle UE must camp in the macrocell. In the case of an activated small cell (which constitutes the small cell for at least one UE or is transmitting data for the UE in a small cell), the specific signal is transmitted, which is advantageous for the UE to find the activated small cell Do.

In the case of a closed UE, it does not receive a specific signal or measurement signal for a small cell, so that a non-idle UE does not need to perform the detection and measurement of a small cell, thereby realizing energy saving. After a non-idle UE changes to a connected state, the base station triggers the UE to receive a specific signal according to demand (e.g., small cell load, channel quality, UE carrier aggregation capability, etc.).

The specific signal of the embodiment according to the present invention indicates a signal capable of identifying an identification small cell, and the UE can identify and confirm the small cell when receiving or detecting such a specific signal. The specific signals in the exemplary embodiment of the present invention may include at least one of a discovery signaling, a channel state information reference signal (CSI-RS), a primary synchronization signal (PSS) and / or a secondary synchronization signal (SSS) A reference signal, and a cell reference signal (CRS).

Among them, the discovery signaling is information for identifying a small cell, transmitted through the physical layer, and also regards conventional PSS / SSS / CRS or PRS (Positioning Reference Signal) or CSI-RS as discovery signaling. Since the CSI-RS sequence is calculated by the identifier (ID) of the small cell, the UE can detect the CSI-RS and perform back-stepping to obtain the corresponding small cell ID. The PSS and SSS are intended to have a small cell ID. The synchronous tracking reference signal and the CRS are similar to the CSI-RS, and the UE may detect the synchronous tracking reference signal or the CRS and back-step to obtain the corresponding small cell ID.

The base station can notify the UE via the macrocell of the specific signal, which is convenient for direct reception of the UE and avoids the process of blind detection of a specific signal. Alternatively, the base station can notify the UE of a sequence value range or a detection range of a specific signal, and the UE can also help to reduce the amount of work that the UE confirms the sequence. For example, when the UE is provided with one or more non-resource control information (for example, CSI-RS-Config, CSI-RS-ConfigNZP, CSI-RS-ConfigNZPId, CSI- Unit, and the configuration information of the CSI-RS including the value of the physical layer sequence of the CSI-RS configuration or a possible potential value set).

Before triggering the base station to transmit a specific signal that is in a deactivated state (off), the base station must determine that it should configure a small cell for at least one UE, otherwise the inactive small cell remains off. In the concrete implementation, it does not transmit a specific signal for a small cell which is in an inactivated state that does not receive trigger information of the base station, and actually maintains the off state, which is advantageous for the network side to conserve energy. However, in the case of a small cell that is providing services for at least one UE or is already configured in the UE, it is necessary to transmit a specific signal because the appropriate UE is convenient to discover in time and provides services for this.

When the base station has determined to configure a small cell for the UE according to load balancing, signal quality, scheduling demand, etc., the base station triggers the transmission of a specific signal to identify a small cell that is inactivated dependent on the macrocell, And notifies the UE to receive the specific signal. The base station notifies the UE by applying dedicated radio resource control (RRC) signaling or by applying a broadcast message to receive the specific signal from the UE. The UE does not receive the specific signal before the UE receives the notification that the base station triggers the UE to receive a specific signal. If the UE is in the idle state, the UE does not receive the specific signal. When triggered to receive a specific signal of a small cell, the UE must identify and identify a small cell corresponding to a particular signal from the received specific signal and report to the base station a small cell of which the channel quality satisfies the predetermined demand, do. The base station selects and configures some or all of the small cells for the UE according to load imbalance, channel quality, UE carrier aggregation capability, and the like of the small cell in the small cell reported by the UE. The base station again turns off the small cells that are not configured for the UE to maintain energy savings.

After the base station configures a small cell (as the spare service small cell of the UE) for the UE, the base station triggers to transmit the measurement signal of the spare service small cell and the UE proceeds to measure the small cell that the base station has configured for the UE . The measurement signal includes, but is not limited to, CSI-RS and CRS. The base station does not transmit a measurement signal for the small cell before triggering the base station to transmit a measurement signal for a small cell configured for the UE and the idle network is for energy saving. When data is not transmitted for a UE in a small cell or when a small cell is not configured in a UE, a measurement signal for a small cell is not transmitted, data is transmitted for a UE in a small cell, Service small cell, it transmits a measurement signal for the small cell.

The UE must report the measurement result of the spare service small cell configured for the base station to the base station and provide service by activating the small cell meeting the predetermined demand for the UE according to the measurement result by the base station, The small cell to be activated is determined by referring to the load situation, the channel quality, and the UE carrier aggregation capability.

The process of small cell serving for UE is divided into two processes: configuration and activation. In other words, the base station first constructs a small cell for the UE and constructs a small cell, the UE must resolve the discovery of the small cell to determine which small cells are suitable for the UE, I.e. the spare service small cell) is not necessarily activated by the base station and serves the UE.

In an embodiment of the present invention, a particular signal of a small cell is triggered by a base station to be transmitted and the small cell does not support camping of a non-stationary UE, so if a small cell is not serviced for the UE, Energy is saved because it is not necessary to transmit a specific signal. In a UE, a non-idle UE selects a macro cell during camping without receiving a specific signal of a small cell, and camping is performed, so that a non-idle UE avoids frequent measurement of a small cell, . In other words, in the case of a closed UE, it can operate in a mode in which a small cell is not present.

Hereinafter, a specific embodiment will be described.

In Embodiment 1 of the present invention, in a heterogeneous frequency heterogeneous network, the coverage of a macro cell and a small cell subordinate thereto is as shown in Fig. According to the method of the present invention, when deploying the network, at least one of the carriers of the macrocell applies a compatible carrier type to provide a relatively large coverage range, and the carrier of the small cell subordinate to the macrocell is a new carrier Type and deployed in the hotspot area to provide a high data experience for the user.

In the case of a macro cell, the ON state must be maintained.

In the case of a small cell subordinate to a macrocell, the deactivation state (i.e., the air interface maintains the off state without transmitting or receiving information) is maintained until transmission of the corresponding specific signal is triggered by the macrocell. If a small cell subordinate to the macrocell is serving for the UE (indicating that it is activated by the base station to provide services for the UE) or is configured by the base station to be a small cell of the UE (i.e., Triggered but the small cell is not activated as a service cell for the UE), it is necessary to continue to transmit a specific signal for these small cells.

In the case of a UE, when a non-idle UE does not receive a specific signal of a small cell and the base station of the macro cell triggers it to receive a specific signal of the small cell, the UE needs to receive a specific signal The base station of the macrocell reports the information on the load status of the small cell, the channel quality, and the carrier that can be supported by the UE among the small cells reported by the UE. And selects a suitable small cell according to the aggregation capability and constructs it in the UE.

The base station of the macro cell triggers to transmit the measurement signal of the spare service small cell to notify it to use to measure the small cell configured for the UE and at the same time to turn it off to a small cell not configured for the UE. The UE performs measurement on the configured small cell and reports the measurement result to the base station of the macrocell. The base station of the macrocell combines the load status of the small cell and the UE carrier aggregation capability according to the measurement result, Activate the cell.

In the second embodiment of the present invention, a heterogeneous frequency heterogeneous network, the coverage of the macro cell and the small cell subordinate thereto is as shown in Fig. When the carrier type of the small cell is deployed in the compatible carrier type, the embodiment of the present invention is also possible.

In this embodiment, camping is not supported for small cells, and for UEs requiring camping, the UE chooses to camp on the macrocell. In this embodiment as well, the method of the first embodiment can be applied to realize the discovery and configuration process of macro cells and small cells. Likewise, energy savings on the network side and the UE side can be guaranteed.

In the third embodiment of the present invention, in a heterogeneous frequency heterogeneous network, the coverage of the macro cell and the small cell subordinate thereto is as shown in Fig. When the carrier type of the small cell is deployed in the compatible carrier type, the embodiment of the present invention is also possible.

In this embodiment, camping is supported for small cells, and for a UE requiring camping, the UE can select and camp suitable small cells. This embodiment is implemented according to the following method.

In the case of a macro cell, the ON state must be maintained.

It transmits a specific signal in a small cell subordinate to the macrocell, regardless of whether a small cell is configured or activated for the UE. A non-idle UE must also receive a specific signal, and the UE identifies and confirms the small cell in the vicinity through a specific signal in a timely manner, and the UE updates and stores the fixed small cell in real time. If the specific signal can support the UE to perform the measurement, the UE directly performs the measurement according to the specific signal and selects and camps the small cell satisfying the camping condition. If the particular signal does not support that the UE is used to perform measurements, the UE may perform measurements using a reference signal (e. G., CRS) for measurement in a small cell and select a suitable small cell I camp.

If the base station has to configure a small cell for the UE, for example a connected UE, the macro cell will identify the small cell by triggering the UE to receive a specific signal of the small cell, (The UE reports a small cell in the vicinity of its stored updated own, and the UE actually receives a specific signal in real time), the macrocell selects a suitable small cell to configure in the UE, and the UE constructs a small Performs measurements on the cell and reports the measurement results, and activates the macro cell by selecting a small cell suitable for the UE.

In the fourth embodiment of the present invention, a heterogeneous frequency heterogeneous network, the coverage of the macro cell and the small cell subordinate thereto is as shown in Fig. According to the method of the present invention, when deploying the network, at least one of the carriers of the macrocell applies a compatible carrier type to provide a relatively large coverage range, and the carrier of the small cell subordinate to the macrocell is a new carrier Type and deployed in the hotspot area to provide a high data experience for the user.

In the case of a macro cell, the ON state must be maintained.

It transmits a specific signal in a small cell subordinate to the macrocell, regardless of whether a small cell is configured or activated for the UE. The UE in the connected state must also receive a specific signal, and the small cell in the vicinity is discriminated and determined in a timely manner through a specific signal. By preparing for the measurement of a small cell, the UE in the connected state only has to measure the small cell in the vicinity of the detected cell, that is, it performs the measurement only at the small cell frequency point found.

When a non-idle UE does not receive a specific signal of a small cell and the base station of the macro cell triggers it to receive a specific signal of the small cell, the UE must identify the small cell in the specific signal received through receiving the specific signal The base station of the macrocell reports the information of the small cell, which has been found and confirmed, and confirmed, to the base station of the macrocell. The base station of the macrocell determines the size of the small cell, the channel quality and the carrier aggregation capability A suitable small cell is selected and configured in the UE.

The base station of the macrocell triggers to transmit the measurement signal of the spare service small cell and notifies the small cell which is used for measuring the small cell configured for the UE and which is not configured for the UE. The UE performs measurement on the configured small cell and reports the measurement result to the base station of the macrocell. The base station of the macrocell combines the load status of the small cell and the UE carrier aggregation capability according to the measurement result, Activate the cell.

Corresponding to an embodiment of the method for finding a small cell, the invention also provides an embodiment of a device for finding a small cell, said device being applied to a base station of the macrocell,

A trigger module that activates a small cell and triggers the transmission of a specific signal, and triggers the UE to receive a specific signal, said specific signal being configured to identify a small cell.

The trigger module notifies the base station of the small cell to transmit the specific signal through signaling.

Preferably, the apparatus further comprises an information receiving module configured to receive information of the reported small cell that the UE has found and determined according to the specific signal received,

And a configuration module for selecting some or all of the small cells from the small cells determined by the UE to configure the spare service small cells of the UE.

Advantageously, the apparatus triggers to transmit a measurement signal of the spare service small cell to the UE, receives a measurement result for the spare service small cell reported by the UE, and, in accordance with the measurement result, Further comprising an activation module configured to select a small cell serving for the UE and activate it into a small cell serving for the UE.

Advantageously, the activation module is also configured to select a small cell serving for the UE in the spare service small cell, according to the load situation of the small cell, the channel quality, and the UE carrier aggregation capability.

Preferably, the trigger module is also configured to trigger a UE to receive a specific signal by transmitting a dedicated RRC signaling or broadcast message.

Preferably, the configuration module is also configured to select some or all of the small cells in the small cell determined by the UE according to the load condition of the small cell, the channel quality, and the UE carrier aggregation capability to configure the spare service small cell of the UE .

The small cell net element

A trigger reception module configured to receive a notification that a base station of a macro cell transmits a specific signal and the specific signal to identify a small cell in an inactive state;

And a specific signal transmission module configured to receive the notification of the base station of the macro cell and then transmit the specific signal to the UE in the macro cell.

Preferably, the network element further comprises a measurement signal transmission module configured to transmit the measurement signal of the spare service small cell to the UE under the trigger of the base station when the small cell is selected by the base station as the spare service small cell of the UE do.

Advantageously, the network element further comprises a UE service module that provides services for the UE after being activated by the base station when selected as a small cell serving by the base station for the UE.

The small cell does not support camping of UEs that are not in use.

The small cell network element is in an inactive state and does not transmit the specific signal when it is not transmitting data for the UE; When there is UE transmission data in the small cell, the small cell network element is active and transmits the specific signal.

If the small cell network element does not transmit data for the UE or if the small cell is not configured as a spare service small cell, the small cell network element does not transmit the measurement signal of the spare service small cell, The small cell network element transmits the measurement signal of the spare service small cell when the small cell is composed of the spare service small cell.

The UE

A specific signal receiving module configured to receive a specific signal by a trigger of a base station of a macro cell and to identify a small cell subordinate to the macro cell,

And a small cell reporting module configured to discover and confirm information of the small cell according to the received specific signal and report to the base station.

Advantageously, the UE further comprises a measurement module configured to receive a measurement signal of the spare service small cell selected by the base station and to report measurement results for the spare service small cell to the base station.

The specific signal receiving module does not receive the specific signal before being triggered by the base station.

The small cell reporting module is a small cell that establishes a small cell to be reported to the base station, where the channel quality satisfies the requirement.

The foregoing is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims (35)

  1. In a method of finding a small cell,
    Triggering a base station of a macro cell to receive a specific signal from a user terminal (UE) and notifying the UE of the specific signal via the macrocell,
    If the particular signal supports performing measurements of the UE, the UE performing measurements in accordance with a specific signal, and
    Wherein the UE identifies and confirms a corresponding small cell according to the received specific signal, and reporting information of the determined small cell to the base station,
    Specific signal in a small cell subordinate to the macrocell regardless of whether the small cell is configured for the UE or activated,
    After the base station triggers the UE to receive a specific signal,
    The base station receiving information of a small cell that the UE has determined to discover and report according to a specific signal received;
    Selecting a small or all small cell in the small cell determined by the UE and configuring the small cell as a spare service small cell of the UE;
    Wherein the base station triggers the base station to transmit a measurement signal of the spare service small cell to the UE, and the base station receives a measurement result for the spare service small cell reported by the UE, Further comprising the step of selecting a small cell serving for the UE and activating the small cell servicing the small cell serving for the UE.
  2. The method according to claim 1,
    Wherein the specific signal is for identifying a small cell,
    Discovery signaling;
    A channel state information reference signal (CSI-RS);
    A main synchronization signal PSS and / or a sub synchronization signal SSS; And
    Cell reference signal CRS,
    Wherein the discovery signaling is information for identifying a small cell, and the PSS / SSS / CRS, or the CRI-RS is used as the discovery signaling.
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  5. The method according to claim 1,
    The CSI-RS notifies the UE of the configuration information of the specific signal, and when the CSI-RS is included in the specific signal, the configuration information of the specific signal includes the configuration related information of the CSI-RS and the value of the physical layer sequence of the CSI- The method comprising the steps of:
  6. The method according to claim 1,
    Wherein the base station triggers the UE to receive the specific signal by transmitting a dedicated radio resource control RRC signaling or broadcast message.
  7. The method according to claim 1,
    Wherein the small cell determined by the UE to report to the base station is a small cell whose channel quality meets the requirement.
  8. The method according to claim 1,
    Characterized in that the UE identifies and confirms a small cell corresponding to the specific signal from the received specific signal and reports to the base station a small cell whose channel quality meets a predetermined demand in the determined small cell Discovery method.
  9. The method according to claim 1,
    Further comprising the step of triggering the base station to transmit the specific signal to the base station of the small cell before the base station of the macro cell triggers the UE to receive the specific signal .
  10. In a small cell discovery system,
    The system includes a base station and a user terminal (UE) of a macrocell,
    Wherein the base station of the macrocell is configured to trigger a user terminal (UE) to receive a specific signal, the specific signal being notified to the UE via the macrocell,
    When the UE supports the measurement of the UE, the UE performs a measurement according to a specific signal, identifies and confirms a corresponding small cell according to the received specific signal, To the base station,
    Specific signal in a small cell subordinate to the macrocell regardless of whether the small cell is configured for the UE or activated,
    The base station, after triggering the UE to receive a specific signal,
    Receiving information of a small cell that the UE has determined to discover and report according to a received specific signal,
    Selecting a small or all small cell in the small cell determined by the UE to constitute the spare service small cell of the UE,
    And transmit a measurement signal of the spare service small cell to the UE. Selecting a small cell serving for the UE in the spare service small cell according to a result of the measurement and activating the small cell serving for the UE according to the measurement result; Wherein the small cell detection system comprises:
  11. The method of claim 10,
    Wherein the specific signal is for identifying a small cell,
    Discovery signaling;
    A channel state information reference signal (CSI-RS);
    A main synchronization signal PSS and / or a sub synchronization signal SSS; And
    Cell reference signal CRS,
    Wherein the discovery signaling is information for identifying a small cell, and the PSS / SSS / CRS, or the CRI-RS is used as the discovery signaling.
  12. The method of claim 10,
    The CSI-RS notifies the UE of the configuration information of the specific signal, and when the CSI-RS is included in the specific signal, the configuration information of the specific signal includes the configuration related information of the CSI-RS and the value of the physical layer sequence of the CSI- Wherein the small-cell detection system comprises:
  13. The method of claim 10,
    Wherein the base station triggers the UE to receive the specific signal by transmitting a dedicated radio resource control RRC signaling or broadcast message.
  14. The method of claim 10,
    Wherein the UE is configured to identify and determine a small cell corresponding to the specific signal from the received specific signal and to report to the base station a small cell in which the channel quality meets a predetermined demand in the determined small cell Small cell discovery system.
  15. The method of claim 10,
    Further comprising a small cell management device,
    Wherein the base station of the macrocell is configured to trigger the small cell management apparatus to transmit the specific signal before triggering the UE to receive a specific signal.
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KR1020157005457A 2012-09-21 2013-09-10 Method and apparatus for finding small cells KR101644281B1 (en)

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Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102883408B (en) * 2012-09-21 2017-04-05 中兴通讯股份有限公司 A kind of discovery method and apparatus of cell
CN103716858B (en) * 2012-09-29 2018-12-14 中兴通讯股份有限公司 It is a kind of to realize that cell is the methods, devices and systems of UE service
EP2949062B1 (en) * 2013-01-25 2018-01-17 LG Electronics Inc. Method and apparatus for performing a measurement to discover small cells in wireless communication system
CN103974278B (en) * 2013-01-31 2019-07-16 上海诺基亚贝尔股份有限公司 Notify NCT information, measuring reference signals and the method for power control in DRX
ES2628323T3 (en) * 2013-02-12 2017-08-02 Nokia Solutions And Networks Oy System and method of load balancing management of cell system driven by user equipment movement
US10178616B2 (en) * 2013-02-21 2019-01-08 Avago Technologies International Sales Pte. Limited Enhanced discovery channel for interworking between a cellular wide-area communication system and a wireless local-area communication system
BR112015019630A2 (en) * 2013-02-22 2017-07-18 Sony Corp communication control device and method, and terminal device
CN104080119B (en) * 2013-03-29 2018-05-11 华为技术有限公司 Signaling method and equipment
CN104105164A (en) * 2013-04-03 2014-10-15 中国移动通信集团公司 Inter-frequency small cell search system, method, discovery signal transmission method and device
CN104105159B (en) * 2013-04-03 2018-02-23 中国移动通信集团公司 Cell finds method and centralized control unit, base station, user equipment
EP2966900B1 (en) 2013-04-12 2018-10-31 Huawei Technologies Co., Ltd. Method and apparatus for assisting terminal in performing measurement
CN105191192B (en) * 2013-05-09 2018-04-20 Lg 电子株式会社 Receive the method for being used for the search signal for detecting small size cell
CN104168615B (en) 2013-05-17 2019-05-10 中兴通讯股份有限公司 The method and device that signal is sent
CN104244372A (en) * 2013-06-14 2014-12-24 中国移动通信集团公司 Method for terminal to have access to small cell, terminal and base station
CN105284159A (en) * 2013-06-19 2016-01-27 索尼公司 Terminal device, communication control device, and communication control method
CN103327525B (en) * 2013-07-10 2015-12-23 武汉邮电科学研究院 Based on the small cell discover method of PUCCH
KR20150014881A (en) * 2013-07-30 2015-02-09 삼성전자주식회사 Apparatus for transmitting and receivng a discovery signal and method thereof in a mobile communication system
EP3032885A4 (en) * 2013-08-05 2017-03-08 Fujitsu Limited Cell discovery and measurement method, base station and user equipment
JP6209898B2 (en) * 2013-08-12 2017-10-11 ソニー株式会社 Communication control device, communication control method, and terminal device
CN105474707B (en) 2013-08-19 2019-04-09 黑莓有限公司 Wireless access network node with closed state
WO2015039315A1 (en) * 2013-09-18 2015-03-26 华为技术有限公司 Small station communication method, device and system
RU2642354C2 (en) 2013-10-28 2018-01-24 ЭлДжи ЭЛЕКТРОНИКС ИНК. Method and device for wireless communication
EP2879425B1 (en) * 2013-11-28 2016-01-06 NTT Docomo, Inc. Macro-cell assisted small cell discovery and resource activation
EP2879440A1 (en) * 2013-11-28 2015-06-03 NTT Docomo, Inc. Macro-cell assisted small cell discovery and resource activation
EP2879434A1 (en) 2013-11-28 2015-06-03 NTT Docomo, Inc. Macro-cell assisted small cell discovery and resource activation
JP2017500803A (en) * 2013-12-11 2017-01-05 ゼットティーイー ウィストロン テレコム エービー CSI-RS based cell discovery signal
WO2015089774A1 (en) * 2013-12-18 2015-06-25 Nokia Solutions And Networks Oy Method and apparatus
CN104735752B (en) * 2013-12-19 2018-06-01 中国电信股份有限公司 Activate method and system and the base station of dormancy micro-base station
JP6444887B2 (en) * 2013-12-25 2018-12-26 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカPanasonic Intellectual Property Corporation of America Mobile station and reception quality measurement method
CN105052194A (en) * 2013-12-30 2015-11-11 华为技术有限公司 Neighbor cell measurement method and device
CN110087286A (en) * 2014-01-14 2019-08-02 夏普株式会社 Base station apparatus and terminal installation
JP2017510141A (en) * 2014-01-26 2017-04-06 華為技術有限公司Huawei Technologies Co.,Ltd. User Equipment, Base Station and Cell Search Method
US9961573B2 (en) * 2014-01-30 2018-05-01 Telefonaktiebolaget Lm Ericsson (Publ) Measurement on SCC SCell and on/off discovery signals
US20150215099A1 (en) * 2014-01-30 2015-07-30 Futurewei Technologies, Inc. System and Method for Channel Quality Feedback
CN103841574A (en) * 2014-03-21 2014-06-04 宇龙计算机通信科技(深圳)有限公司 Small cell semi-static on-off conversion method and system
US9456406B2 (en) * 2014-03-28 2016-09-27 Intel IP Corporation Cell discovery and wake up through device-to-device discovery protocols
CN103957557B (en) * 2014-04-25 2017-11-10 工业和信息化部电信传输研究所 A kind of terminal measurement reporting method
CN105101280B (en) * 2014-05-09 2019-06-18 中国移动通信集团公司 Method, equipment and the system of transfer point identification and wireless resource management measurement
WO2015180181A1 (en) * 2014-05-30 2015-12-03 华为技术有限公司 Data transmission method and base station
US20160037440A1 (en) * 2014-07-31 2016-02-04 Microsoft Corporation Cell discovery
CN104618956B (en) * 2015-01-12 2018-05-01 中国联合网络通信集团有限公司 A kind of method and device for controlling cell
CN106304123A (en) * 2015-06-10 2017-01-04 电信科学技术研究院 The small-cell resource allocation method of a kind of mobile radio network and device
US9877263B1 (en) * 2016-05-14 2018-01-23 Sprint Communications Company L.P. Carrier aggregation (CA) for user equipment (UE) and wireless relays

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101784039A (en) 2009-01-20 2010-07-21 华为技术有限公司 Method for activating communication apparatus, network side apparatus and network system
CN102238663A (en) 2010-05-06 2011-11-09 电信科学技术研究院 Method, system and device for making base station entering working state
WO2012094608A2 (en) 2011-01-07 2012-07-12 Interdigital Patent Holdings, Inc. Communicating channel state information (csi) of multiple transmission points

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2450481C2 (en) * 2007-11-08 2012-05-10 Телефонактиеболагет Лм Эрикссон (Пабл) Method and device to support service transfer from wcdma land mobile network into public access network
US9504007B2 (en) * 2009-06-24 2016-11-22 Samsung Electronics Co., Ltd. Terminal, method for managing thereof, base station and method for managing thereof
JPWO2011004599A1 (en) * 2009-07-10 2012-12-20 パナソニック株式会社 Mobile communication system, terminal device and base station device
KR101083542B1 (en) * 2009-10-16 2011-11-14 주식회사 팬택 Small sized base-station and method for controlling operation thereof
US8599708B2 (en) * 2010-01-14 2013-12-03 Qualcomm Incorporated Channel feedback based on reference signal
JP5352513B2 (en) * 2010-03-31 2013-11-27 株式会社日立製作所 Wireless communication system and handover control method
US8892094B2 (en) * 2010-06-15 2014-11-18 Telefonaktiebolaget L M Ericsson (Publ) Cell search and measurement in heterogeneous networks
RU2573220C2 (en) * 2010-06-21 2016-01-20 Телефонактиеболагет Л М Эрикссон (Пабл) Method and arrangement for signalling parameters in wireless network
CN102340379B (en) * 2010-07-15 2015-04-22 中国移动通信集团公司 CSI-RS (Channel Status Information-Reference Signal) transmission method and detection method, and devices of CSI-RS transmission method and detection method
WO2012029237A1 (en) * 2010-09-03 2012-03-08 パナソニック株式会社 Wireless communication system, low transmission power cell base station, macrocell base station, wireless terminal, and load distribution method
WO2012067430A2 (en) * 2010-11-16 2012-05-24 엘지전자 주식회사 Method and apparatus for providing control information
KR101740371B1 (en) * 2010-11-22 2017-06-08 삼성전자 주식회사 Device and method for allocating a antenna in cellular mobile communication system
US8918096B2 (en) * 2011-07-15 2014-12-23 Nokia Corporation Method and apparatus providing multi-level proximity indication and small cell discovery
US9204354B2 (en) * 2011-08-11 2015-12-01 Mediatek Inc. Method for small cell discovery in heterogeneous network
US9008720B2 (en) * 2011-09-26 2015-04-14 Blackberry Limited Method and system for small cell discovery in heterogeneous cellular networks
US20130188624A1 (en) * 2012-01-20 2013-07-25 Jung Seung Lee Apparatus and method for searching neighbor cells of small cell base station
US8767581B2 (en) * 2012-03-28 2014-07-01 Sharp Laboratories Of America, Inc. Coordinated multipoint (CoMP) radio resource management (RRM) measurement
US8559917B1 (en) * 2012-03-30 2013-10-15 Alcatel Lucent Method, apparatus and computer readable medium for associating user equipment with a cell
JP6045843B2 (en) * 2012-07-31 2016-12-14 株式会社Nttドコモ Communication system, base station device, mobile terminal device, and communication method
US9451533B2 (en) * 2012-07-31 2016-09-20 Industrial Technology Research Institute Small cell detection method and apparatuses using the same
US9693280B2 (en) * 2012-08-08 2017-06-27 Nokia Solutions And Networks Oy Interference reduction through cell activation methods in heterogeneous networks
EP2893746A4 (en) * 2012-09-03 2016-04-20 Nokia Technologies Oy Local cell discovery in macro-assisted enhanced local area
CN102883408B (en) * 2012-09-21 2017-04-05 中兴通讯股份有限公司 A kind of discovery method and apparatus of cell

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101784039A (en) 2009-01-20 2010-07-21 华为技术有限公司 Method for activating communication apparatus, network side apparatus and network system
CN102238663A (en) 2010-05-06 2011-11-09 电信科学技术研究院 Method, system and device for making base station entering working state
WO2012094608A2 (en) 2011-01-07 2012-07-12 Interdigital Patent Holdings, Inc. Communicating channel state information (csi) of multiple transmission points

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Nokia Siemens Networks, ‘Background search for small cell detection’, 3GPP TSG-RANWG2 Meeting #78, R2-122366, 2012년 5월 21일.*

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